<template>
  <div class="app-container">
    <h2 style="text-align: center;">发布新课程</h2>

    <el-steps :active="2" process-status="wait" align-center style="margin-bottom: 40px;">
      <el-step title="填写课程基本信息" />
      <el-step title="创建课程大纲" />
      <el-step title="提交审核" />
    </el-steps>

    <el-button type="text" @click="asRRR()">添加章节</el-button>
    <!-- 章节 -->
    <ul class="chanpterList">
      <li v-for="chapter in chapterNestedList" :key="chapter.id">
        <p>
          {{ chapter.title }}
          <span class="acts">
            <el-button type="text" @click="addVideo(chapter.id)">添加课时</el-button>
            <el-button style type="text" @click="edit(chapter.id)">编辑</el-button>
            <el-button type="text" @click="removeChapter(chapter.id)">删除</el-button>
          </span>
        </p>

        <!-- 视频 -->
        <ul class="chanpterList videoList">
          <li v-for="video in chapter.children" :key="video.id">
            <p>
              {{ video.title }}
              <span class="acts">
                <el-button type="text" @click="uptVideo(video.id)">编辑</el-button>
                <el-button type="text" @click="removeVideo(video.id)">删除</el-button>
              </span>
            </p>
          </li>
        </ul>
      </li>
    </ul>
    <div>
      <el-button @click="previous">上一步</el-button>
      <el-button :disabled="saveBtnDisabled" type="primary" @click="next">下一步</el-button>
    </div>

    <!-- 添加和修改章节表单 -->
    <el-dialog :visible.sync="dialogChapterFormVisible" title="添加章节">
      <el-form :model="chapter" label-width="120px">
        <el-form-item label="章节标题">
          <el-input v-model="chapter.title" />
        </el-form-item>
        <el-form-item label="章节排序">
          <el-input-number v-model="chapter.sort" :min="0" controls-position="right" />
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
        <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
      </div>
    </el-dialog>

    <!-- 添加和修改章节表单 -->
    <el-dialog :visible.sync="BarVideo" title="添加章节">
      <el-form :model="video" label-width="120px">
        <el-form-item label="小节标题">
          <el-input v-model="video.title" />
        </el-form-item>
        <el-form-item label="小节排序">
          <el-input-number v-model="video.sort" :min="0" controls-position="right" />
        </el-form-item>
        <el-form-item label="上传视频">
          <el-upload
            :on-success="handleVodUploadSuccess"
            :on-remove="handleVodRemove"
            :before-remove="beforeVodRemove"
            :on-exceed="handleUploadExceed"
            :file-list="fileList"
            :action="BASE_API+'/vodService/vod/save'"
            :limit="1"
            class="upload-demo"
          >
            <el-button size="small" type="primary">上传视频</el-button>
            <el-tooltip placement="right-end">
              <div slot="content">
                最大支持1G，
                <br />支持3GP、ASF、AVI、DAT、DV、FLV、F4V、
                <br />GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、
                <br />MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、
                <br />SWF、TS、VOB、WMV、WEBM 等视频格式上传
              </div>
              <i class="el-icon-question" />
            </el-tooltip>
          </el-upload>
        </el-form-item>
      </el-form>

      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
        <el-button type="primary" @click="videoSave()">确 定</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import chapter from "@/api/chapter";
import videoBen from "@/api/video";
export default {
  data() {
    return {
      dialogChapterFormVisible: false,
      saveBtnDisabled: false, // 保存按钮是否禁用
      id: "",
      chapterNestedList: [],
      chapter: {},
      video: {},
      BarVideo: false,
      fileList: [], //上传文件列表
      BASE_API: process.env.BASE_API, // 接口API地址
      videoOriginalName: ""
    };
  },

  created() {
    console.log("chapter created");
    this.init();
    this.querytree(this.id);
  },

  methods: {
    beforeVodRemove(file, fileList) {
      return this.$confirm(`确定移除 ${file.name}？`);
    },
    handleVodRemove(file, fileList) {
      videoBen.removeById(this.video.videoSourceId).then(response => {
         (this.video.videoSourceId = ""),
        (this.video.videoOriginalName = ""),
        (this.fileList = []);
        this.$message({
          type: "success",
          message: response.message
        });
      });
    },

    //成功回调
    handleVodUploadSuccess(response, file, fileList) {
      this.video.videoSourceId = response.data.vodId;
      this.video.videoOriginalName = file.name;
    },
    //视图上传多于一个视频
    handleUploadExceed(files, fileList) {
      this.$message.warning("想要重新上传视频，请先删除已上传的视频");
    },

    uptVideo(id) {
        (this.video.videoSourceId = ""),
        (this.video.videoOriginalName = ""),
        (this.fileList = []);
      videoBen.geByid(id).then(response => {
        (this.BarVideo = true), (this.video = response.data.data);
        if (
          this.video.videoOriginalName == "" ||
          this.video.videoOriginalName == null ||
          this.video.videoOriginalName == "undefined"
        ) {
        } else {
          this.fileList = [{ name: this.video.videoOriginalName }];
        }
      });
    },

    //删除
    removeVideo(id) {
      // 
      this.$confirm(
        "此操作将永久删除该课程，以及该课程下的章节和视频，是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }
      )
        .then(() => {
          return videoBen.del(id);
        })
        .then(() => {
          this.$message({
            type: "success",
            message: "删除成功!"
          });
          this.querytree(this.id);
        })
        .catch(response => {
          // 失败
          if (response === "cancel") {
            this.$message({
              type: "info",
              message: "已取消删除"
            });
          }
        });
    },

    //保存小节
    videoSave() {
      this.video.courseId = this.id;
      this.fileList = [];
      ;
      videoBen.save(this.video).then(response => {
        this.BarVideo = false;

        this.video = {};
        this.$message({
          type: "success",
          message: "保存成功!"
        });
        this.querytree(this.id);
      });
    },
    //点击弹出添加小节
    addVideo(id) {
      this.video = {};
      this.BarVideo = true;
      this.video.chapterId = id;
    },

    // 章节js

    asRRR() {
      this.chapter = {};
      this.dialogChapterFormVisible = true;
    },

    edit(id) {
      chapter.geByid(id).then(response => {
        (this.dialogChapterFormVisible = true),
          (this.chapter = response.data.data);
      });
    },

    //删除
    removeChapter(id) {
      // 
      this.$confirm(
        "此操作将永久删除该课程，以及该课程下的章节和视频，是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }
      )
        .then(() => {
          return chapter.del(id);
        })
        .then(() => {
          this.$message({
            type: "success",
            message: "删除成功!"
          });
          this.querytree(this.id);
        })
        .catch(response => {
          // 失败
          if (response === "cancel") {
            this.$message({
              type: "info",
              message: "已取消删除"
            });
          }
        });
    },

    saveOrUpdate() {
      this.saveAll();
    },
    saveAll() {
      this.chapter.courseId = this.id;
      chapter.save(this.chapter).then(response => {
        this.dialogChapterFormVisible = false;
        this.querytree(this.id);
        this.chapter = {};
        this.$message({
          type: "success",
          message: "保存成功!"
        });
      });
    },
    init() {
      if (this.$route.params && this.$route.params.id) {
        this.id = this.$route.params.id;
      } else {
      }
    },
    querytree(id) {
      chapter
        .getNestedTreeList(id)
        .then(response => {
          this.chapterNestedList = response.data.tree;
        })
        .catch(response => {});
    },
    previous() {
      console.log("previous");
      this.$router.push({ path: "/course/info/" + this.id });
    },

    next() {
      this.$router.push({ path: "/course/publish/" + this.id });
    }
  }
};
</script>

<style scoped>
.chanpterList {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}
.chanpterList li {
  position: relative;
}
.chanpterList p {
  float: left;
  font-size: 20px;
  margin: 10px 0;
  padding: 10px;
  height: 70px;
  line-height: 50px;
  width: 100%;
  border: 1px solid #ddd;
}
.chanpterList .acts {
  float: right;
  font-size: 14px;
}

.videoList {
  padding-left: 50px;
}
.videoList p {
  float: left;
  font-size: 14px;
  margin: 10px 0;
  padding: 10px;
  height: 50px;
  line-height: 30px;
  width: 100%;
  border: 1px dotted #ddd;
}
</style>